Audi A4 Quattro hazard lights flashing unexpectedly while driving and when the vehicle is off on Audi A4 Quattro

Some Audi A4 Quattro owners report experiencing unexpected flashing hazard lights, which may indicate issues with the hazard warning switch on the dashboard that can remain lit without flashing after the engine is turned off. Additionally, a quiet alarm sound from the right rear of the vehicle could be linked to the hazard lights, as pressing the hazard button affects the blinking speed. Problems with the hazard switch or the Comfort Control Module under the passenger floor might persist even after the switch has been replaced. To temporarily resolve the flashing hazard lights, some owners find that manually turning them off and locking the car with the key can be a workaround, though it is not ideal. It is also advised to check for current draw that could be draining the battery, as this may contribute to the issue. Furthermore, investigating any triggers for the alarm system is recommended, as there may be a separate horn that did not sound when the hazard lights were flashing.